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Income Taxes - Schedule of Effective Income Tax Rate Reconciliation (Details) - USD ($)		12 Months Ended
	Dec. 22, 2017	Dec. 28, 2018	Dec. 29, 2017	Dec. 30, 2016
Increase (decrease) in taxes resulting from:
Computed provision (benefit) for taxes based on income at statutory rate percentage	35.00%	21.00%	34.00%	34.00%
Permanent differences percentage		0.60%	(0.90%)	(3.00%)
Change in the future federal tax rate percentage		0.00%	(833.00%)	0.00%
State minimum taxes, net of federal income tax benefit percentage		0.10%	(0.30%)	(0.10%)
State tax benefit percentage		(6.70%)	8.30%	6.20%
Foreign tax differential percentage		(11.00%)	(1.30%)	(8.90%)
Expiration of state net operating tax loss carryforwards percentage		0.00%	(36.40%)	(7.20%)
Foreign earnings not permanently reinvested, net of the participation exemption percentage		(14.00%)	108.10%	6.50%
Foreign dividend withholding percentage		4.80%	(0.30%)	3.80%
ASC 718 share based payment adjustment percentage		(6.50%)	0.00%	0.00%
Other percentage		0.50%	(2.60%)	1.10%
Valuation allowance percentage		36.40%	731.20%	(29.90%)
Effective tax provision (benefit) percentage		25.20%	6.80%	2.50%
Increase (decrease) in taxes resulting from:
Computed provision (benefit) for taxes based on income at statutory rate		$ 1,394,000	$ (781,000)	$ (4,231,000)
Permanent differences		41,000	21,000	373,000
Change in the future federal tax rate		0	19,125,000	0
State minimum taxes, net of federal income tax benefit		8,000	8,000	12,000
State tax benefit		(447,000)	(190,000)	(767,000)
Foreign tax differential		(730,000)	29,000	1,109,000
Expiration of state net operating tax loss carryforwards		0	836,000	892,000
Foreign earnings not permanently reinvested, net of the participation exemption		(926,000)	(2,482,000)	(809,000)
Foreign dividend withholding		317,000	7,000	(478,000)
ASC 718 Share Based Payment Adjustment		(434,000)	0	0
Other		30,000	59,000	(139,000)
Valuation allowance		2,418,000	(16,789,000)	3,723,000
Provision (benefit) for income taxes		$ 1,671,000	$ (157,000)	$ (315,000)

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
-Topic 740
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